. >> reporter: as president obama sauntered into the east room of the white house for his post-victory news conference, the scandal that's engulfed the highest levels of his national security team still swirled around him. tonight, abc news has learned the identity of the fbi agent who ignited the whole staggering chain of events. fredrik humphreys, a 47-year-old fbi veteran who is active in counterterrorism cases, is friends with tampa socialite jill kelley who turned to him when she got some harassing e-mails. meanwhile, in washington, paula broadwell, petraeus' former mistress, who allegedly sent the e-mails to kelley, remained in hiding at her brother's home. today, the fbi said she illegally had classified material at her home in north carolina, though no charges have been filed. jill kelley also remains at her home in tampa. her access to centcom revoked. this afternoon at the white house, president obama finally weighed in on this scandal, declared that no breach of national security occurred and spoke with sadness of the fall of david petraeus. >> general petraeus had an extrao